The Philips Company was established in the Netherlands in 1891 by Frederik Philips and his son. They are most well-known for producing light bulbs, household ...

Humans may hear sonic vibrations in the frequency range of 16 Hz to 20 kHz. Everything above this level is ultrasonic, while everything below is infrared. ...

BURST Oral Care collaborates with dentists to provide real-time feedback, resources, and product development. They sell a sonic toothbrush, a kids' sonic ...